<!DOCTYPE html>
<html>
	<head>
		<title>二级菜单栏</title>
		<meta charset="utf-8"/>
		<style type="text/css">
			*{
				margin: 0px;
				padding: 0px;
			}
			a{
				color: #fff;
				text-decoration: none;
			}
			#a{
				width: 1000px;
				height: 50px;
				background: purple;
			}
			li{
				margin-left:65px;
				width: 110px;
				line-height: 50px;
				text-align: center;
				/*display: inline-block;*/
				list-style: none;
				float: left;
			}
			.b{
				background: #9982bc; 
			}
			#c:hover{
				text-decoration: underline;
			}
			#two{
				display: none;
			}
			#two li{
				width: 190px;
				margin: 0px;
				text-indent: -6em;
			}
			#e{
				text-indent: -7em;
			}
			#c:hover #two{
				display: block;
			}
		</style>
	</head>
	<body>
		<div id="a">
			<ul class="one">
				<li class="b"><a href="#">首页</a></li>
				<li><a href="#">教学运行</a></li>
				<li><a href="#">教学保障</a></li>
				<li><a href="#">教学评估</a></li>
				<li id="c">
					<a href="#">规章制度</a>
					<ul id="two">
						<li class="b"><a href="#">省级部</a></li>
						<li class="b" id="e"><a href="#">校级</a></li>
					</ul>
				</li>
			</ul>
		</div>
	</body>
</html>